Samsung has started the One UI 2.0 beta program for the Galaxy Note 10 and Note 10+ in China. The company has already started the One UI 2.0 beta program in Germany and India.
You can register for the beta program by opening the Samsung Members app, press the notification icon on top to go to the Notices section, and tapping the Registrations for One UI Beta Program notice.
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Then tap the One UI Beta Program banner, scroll through the terms and conditions, then tap the Enroll button to register. After that go to the Settings > Software update > Download and install.